About the only way you can control speed in some gnarly glades is to literally scruff of speed whenever you can and if you have to, zing around a tree and face up hill some if you need to.

Glades are my favorite stuff to ride and I've bounced off a ton of trees, it happens....

I've also found a lot of fun in making big zig zags and essentially side hilling back and fourth thru the trees to make a sweet tree run last a lot longer. But that's in really tight trees.... More open trees like aspens or something I like to just fly thru those weaving in and out of them.

But ya, it's all about practice.... I can shred trees with the best of them but you get me on a wide open bowl with bottomless powder and I flail around like an idiot and can't make a good looking line to save my life.